ICP DAS USA I-7521, Руководство пользователя

Страница: 107 / 148

I-7521/I-7522/I-7522A/I-7523/I-7524/I-7527 User’s Manual,Ver2.5 Aug.2015
107
5.3.29 ~AA5P & ~AA5S

Description :
This function sets the current state of the digital output as a power-on/safe value.
(1)
When the module is first powered-on , all output channels will revert to their
power-on values .
(2)
If the module is malfunction , the hardware module watchdog will reset the module
and all output channels will also revert to their power-on values . These
power-on values may be different from the previous values that existed before
the module was reset.
Therefore, new output commands must be set to return all
output values to their desired states.
(3)
When the host watchdog is enabled and the host is malfunction , all output values
will change to their safe values and module status will change to 0x04. If the module
status is 0x04, all output command will be ignored until the module status is cleared
using the ~AA1 command (see sec3.23). Therefore an ~AA1 command must be sent
before any new output command are sent to return all output values to their desired
states.

Syntax :
~AA5P[chk](CrLf)

sets the power-on value
~AA5S[chk](CrLf)

sets the safe value
~ Delimiter character
AA 2-character module address in HEX format. The valid range is from 00 to FF
[chk]
2-character checksum. If the checksum is disabled

no [chk]
(CrLf) End Character

Response : valid command

!AAV[chk](CrLf)
invalid command

?AA[chk](CrLf)
no response

syntax error, communication error, or address error
! Delimiter character indicating a valid command
? Delimiter character indicating an invalid command
AA 2-character module address in HEX format
V
D0=DO0, D1=DO1, D2=DO3, D3=DO4, D4=DO5
[chk] 2-character checksum. If the checksum is disabled

no [chk]
(CrLf) End Character

Example : (Assume the AA address value of the I-7521 module is 01)
command: ~015P(CrLf)
response: !017(CrLf)
command: ~025S(CrLf)
response: !020(CrLf)
For: I-7521/I-7522/I-7522A/I-7524/I-7527
Set the power-on value to DO-1/2/3 all
ON
Sets the safe value to DO-1/2/3 all OFF